[re-sent with list reply-to in address; I thought I had done that, but I got an out of office reply sent to me.]
On 12/20/2010 7:05 AM, Bodoh John Robert wrote:
Ed, Martin, John, Tony, et al, What I am doing is creating macros that are used by any other application. I was hoping to avoid having the user of these macros have to specify the technique needed to address symbols.
That sounds clutzy and it nowhere else in the assembler do I have to tell the assembler that kind of detail. At the time the macro is being used, the macro does not know whether baseless coding is being used or not and whether or not a symbol is within the current CSECT or not. If the symbol is within the current CSECT and code invoking the macro is using baseless coding, the macro MUST use baseless instructions.
As I understand it, the symbol is within the current CSECT, baseless instructions can be used whether or not the invoking code is using baseless or not. Otherwise, based instructions MUST be used.
I'm at a loss here. First, you reference symbols for one of two reasons: 1) a target for a branch or execute instruction, and 2) a location for an operand. In case 1), you can always use the so-called baseless instructions; in case 2), it depends on the operation you need to perform. For example, loading an address of a location can always be done by LARL - unless the item is at an odd address! If you need to work with packed decimal data, you must use the xP instructions, all of which require base / displacement. What instructions are you thinking of where you would choose between baseless and based?
I am surprised this not considered a hole in the assembler and is not more pervasive than just for me and my simple case. Do not other macros have the same problem? John -----Original Message----- From: IBM Mainframe Assembler List [mailto:[email protected]] On Behalf Of Martin Trübner Sent: Saturday, December 18, 2010 3:55 AM To: [email protected] Subject: Re: Baseless vs Based Ed, While I understand your point (missed you anyway in this thread ;-) ) I do not see the word DSECT mentioned in the OP-s stmt. John, was your question as simple as I assume or was it as sophisticated as Tony and Ed answered (with solutions from John E. and Paul)? -- Martin Pi_cap_CPU - all you ever need around MWLC/SCRT/CMT in z/VSE more at http://www.picapcpu.de
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